EP1560520B1 - Bite device used with a panorama x-ray device - Google Patents

Bite device used with a panorama x-ray device Download PDF

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Publication number
EP1560520B1
EP1560520B1 EP03767386A EP03767386A EP1560520B1 EP 1560520 B1 EP1560520 B1 EP 1560520B1 EP 03767386 A EP03767386 A EP 03767386A EP 03767386 A EP03767386 A EP 03767386A EP 1560520 B1 EP1560520 B1 EP 1560520B1
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EP
European Patent Office
Prior art keywords
bite
block assembly
bite block
plate
holding member
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Expired - Lifetime
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EP03767386A
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German (de)
French (fr)
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EP1560520A1 (en
Inventor
Klaus Stoeckl
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Sirona Dental Systems GmbH
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Sirona Dental Systems GmbH
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/50—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications
    • A61B6/51—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications for dentistry
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/04—Positioning of patients; Tiltable beds or the like
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/50—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications
    • A61B6/51—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications for dentistry
    • A61B6/512—Intraoral means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/44—Constructional features of apparatus for radiation diagnosis
    • A61B6/4423—Constructional features of apparatus for radiation diagnosis related to hygiene or sterilisation

Definitions

  • the invention relates to a device for correct positioning of a patient in a recording with a panoramic medical radiography device.
  • the patient's head is fixed to the device for panoramic X-ray exposure via a patient's head positioning with forehead support and / or earlobe, tooth rack, nasion, or chin rest.
  • the necessary alignment of the head is typically via light lines that are projected onto the patient's head and depicting the Frankfurt horizontal and the median levels.
  • the Frankfurt horizontal runs through the right and left porion, the highest point of the external auditory meatus, and the orbital, which represents the lowest point of the orbital bony margin.
  • the projected median plane runs as a sagittal plane from the vertex over the middle of the nose to the chin. It supports the symmetrical positioning of the head.
  • the position of the occlusal plane is not recorded directly, but only indirectly via the Frankfurt horizontal.
  • the Frankfurt horizontal and the incisors projecting from the panoramic X-ray device onto the head of the patient are closed to the position of the occlusal plane.
  • the correlation between the occlusal plane and the horizontal plane of Frankfurt is generally accepted by the anatomy, positioning errors with respect to the patient's Frankfurt horizontal are not excluded.
  • an optional face size measurement can be performed.
  • the derivation of the jaw size is not sufficiently reliable.
  • a positioning apparatus which uses to generate transversal tomograms becomes.
  • This positioning apparatus comprises a fixedly arranged with respect to the X-ray apparatus holder and a pivotable plate, wherein means are provided, with which the angle of rotation between the plate and the holder can be detected. With this positioning, it is possible to adjust the inclination of the occlusal plane by means of the adjustment.
  • the positioning apparatus disclosed in D1 is only suitable for creating transversal tomograms.
  • the position of the chin rest can be read out via means for storing the object position, wherein a change of the position is to be made via controlled motors, for example via stepper motors.
  • the object of the invention is to provide a device for correct positioning of a patient in a recording with a panoramic medical X-ray recorder, a simple and robust detection and / or adjustment of the inclination of the occlusal plane of a patient allowed.
  • the invention builds on the state of the art in that a bite device contains a directionally fixed to the X-ray machine holder part and a pivotable against the holder part plate having a Aufbissteil, in which the patient bites.
  • the bite apparatus further comprises means for detecting the tilt angle ⁇ associated with the inclination of the occlusal plane between the plate and the holder part, wherein the means for detecting the pivot angle ⁇ are arranged in a radiation-free region of the bite device in an X-ray exposure.
  • the area covered by X-rays can thus be kept as free of metal as possible.
  • the invention is thus based on the idea of detecting the relative position of the patient's occlusal plane to the device via the position determination of a plate lying in the occlusal plane. For this purpose, the angle between the plate and a holder part is measured, which can be arranged relative to the X-ray device with a fixed orientation. From this angle, a signal can then be derived that indicates the inclination of the occlusal plane.
  • the means for detecting the pivot angle ⁇ expediently comprise one or more sensors arranged in the holder part.
  • the sensors may be formed by a light barrier arranged in the holder part, which detects the position of a recess moved up and down by the pivoting of the plate.
  • the bite device according to the invention may expediently include means for indicating the angular position of the pivotable plate.
  • drive means are provided for adjusting the height of the holding part and thus for pivoting the plate in a predetermined angular position.
  • the means for pivoting the plate drive the predetermined angular position automatically and stop on reaching the predetermined angular position.
  • the means indicate the achievement of the predetermined angular position of the plate by optical and / or acoustic signals.
  • the pivotable plate is connected to a rail movable up and down in the holder part, which has a recess for determining the position of the rail in the holder part. From the position of the recess in the holder part can then be closed to the swivel angle ⁇ .
  • the Aufbissteil the bite device is provided in an expedient embodiment for reasons of hygiene with a removable protective cover.
  • the bite portion may be formed by a replaceable bite insert.
  • the bite insert is preferably formed of a soft material, in particular of a substantially radiolucent material.
  • the production of the bite insert made of closed-cell ethylene foam has proven particularly suitable.
  • the Aufbissinsatz expediently takes an angle range ⁇ of the mandibular arch, which is between 20 ° and 40 °, in particular at about 30 °. As a result, lateral tilting or tilting of the patient's head is largely avoided.
  • the bite insert on its top and bottom underside a bite groove for receiving a portion of the dental arch of the upper and lower jaw of the patient.
  • the Aufbisshus is advantageously integrally formed and hinged along a folding edge.
  • it has on opposite sides of a wedge-shaped tapered projection and a corresponding recess for receiving the projection, for releasably attaching the Aufbisshuses to the pivoting plate.
  • Fig. 1 shows a schematic representation of a panoramic X-ray recording device 10, wherein a pivotable Unit 12 carries a radiation source 14 with a diaphragm 16, and an opposite detector camera 18 with a diaphragm 20.
  • the X-ray 22 emanating from the radiation source 14 transilluminates the jaw region of the head 24 of a patient and generates an image signal in the detector camera 18. This is fed to an evaluation unit 26 for evaluation and display in a conventional manner.
  • the rotary unit 12 is attached to a boom 11 rotatably or pivotally mounted, wherein the boom 11 is mounted vertically adjustable on a column 13.
  • a drive 15 is provided to carry out the height adjustment. In this way, the X-ray source 14 and the detector camera 18 can be aligned to the size of the patient.
  • Essential for a high-quality, error-free panoramic radiograph is the alignment of the tomographic zone 30 (FIG. Fig. 2 ) on the mandibular arch comb 32 of the patient.
  • Fig. 2 shows a perfect spatial alignment of the two elements, which ensures a qualitatively perfect recording. Inadequate alignment can lead to the need for a repeat scan, resulting in increased patient exposure and additional material and time.
  • Fig. 3 shows a perspective view of a bite device generally designated 40 according to an embodiment of the invention in a schematic representation, Fig. 4 a section through the bite device 40 of Fig. 3 ,
  • the bite device 40 has a holder 42, to which a thin plate 46 is pivotally connected via a joint 44. On its side facing away from the hinge 44, the thin plate 46 merges into a receiving region 48 formed parallel to the thin plate.
  • the receiving area 48 has a recess 62, by means of which in a manner described in more detail below, a replaceable Aufbissdorf 50 can be quickly and easily attached to the thin plate.
  • the bite insert 50 is provided with a bite groove 64 and 66 respectively, each receiving the dental arch of the upper and lower jaw of the patient. This design ensures that the thin plate 46 is parallel to the patient's occlusal plane as it bites into the bite insert 50 during X-ray exposure.
  • the pivoting angle ⁇ of the thin plate 46 is measured via a movable up and down rail 54, which is connected in a region 56 with the thin plate 46, and in the interior 52 of the holder member 42 extends vertically downwards.
  • the rail 54 is provided with a hole 58.
  • the altitude of the hole 58 is determined by two light barriers, which are indicated by the arrows 60. From the altitude can be deduced the pivot angle of the plate 46.
  • the measurement of the pivot angle ⁇ is moved far down in a radiation-free region of the holder 42. The X-ray region can thus be kept largely free of metal.
  • the bite device acts with a in Fig. 1 shown drive means 15 together, so that the rail 54 is moved up or down and thus the thin plate 46 can be brought into a desired position.
  • the associated with the height adjustment pivoting of the thin plate 46 of the patient's head is gently guided in until he has reached the correct slope for the panoramic radiograph.
  • the drive can drive the plate 46 automatically in the set angular position and stop when reaching the desired position.
  • the angular position of the plate can be displayed for the operator to check.
  • FIGS. 5 to 7 The in the FIGS. 3 and 4 Bite insert 50 will now be described with reference to FIGS. 5 to 7 described in more detail.
  • Fig. 5 in (a) and (b) is a perspective view of the unfolded insert, seen in Fig. 5 (a) diagonally from below and in Fig. 5 (b) diagonally from above.
  • FIG. 6 shows a section through the bite insert along the line VI-VI of Fig. 5 (b) and Fig. 7 represents the Aufbissinsatz in folded position, as he at the bite of the Fig. 3 is appropriate.
  • the bite insert 50 is produced in one piece from closed-cell ethylene foam, a soft, largely X-ray transparent material. On its upper side, the bite insert 50 has bite grooves 64 and 66 which receive a portion of the dental arch of the patient's upper and lower jaws. The bite insert 50 may be folded along a central fold edge 70 defined by notches 72 on the bottom and a center groove 74 on the top of the insert.
  • the bite insert 50 On its underside, the bite insert 50 has a wedge-shaped tapered projection 76 which, when folded, engages a corresponding recess 78 disposed on the opposite side of the insert to produce a stable but easily releasable connection.
  • the planar receiving region 48 of the bite device contains a recess 62 (FIG. Fig. 4 ), through which the projection 76 engages when attaching the Aufbissinsatzes, so that the insert 50 is fixedly connected after folding with the thin plate 46 of the bite device. After use, however, the insert can be unfolded again without great effort and thrown away for reasons of hygiene.
  • insert takes at a width of 40 mm on an angular range ⁇ of the dental arch of about 30 °.
  • bite inserts are also manufactured and used in other widths. The different widths can be easily distinguished by different color markings or other markings for the user. With such a bite insert the fixation of the patient is very accurate and yet comfortable for the patient.

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Abstract

A bite device for the correct positioning of a patient when a panoramic X-ray is taken, comprising a holder part which can be placed in a fixed direction in relation to the X-ray device, a plate which can pivot against the holder and which is provided with a bite part into which a patient bites, and means for detecting the pivoting angle A between the plate and the holder part.

Description

Technisches GebietTechnical area

Die Erfindung betrifft eine Vorrichtung zur korrekten Positionierung eines Patienten bei einer Aufnahme mit einem medizinischen Panorama-Röntgenaufnahmegerät.The invention relates to a device for correct positioning of a patient in a recording with a panoramic medical radiography device.

Stand der TechnikState of the art

Beim Aufnehmen einer Panorama-Röntgenaufnahme verläuft die Tomographiezone idealerweise durch den Kieferkammbogen des Patienten. Um eine hohe Aufnahmequalität zu erreichen, ist es erforderlich, die beiden Elemente Tomographiezone und Kieferkammbogen in möglichst gute räumliche Übereinstimmung zu bringen. Dabei kann die Tomographiezone auf Seiten des Panorama-Röntgengeräts prinzipiell innerhalb gewisser Grenzen auf die individuelle Form und Lage des Kiefers eines Patienten angepasst werden. Voraussetzung ist allerdings, dass diese dem Bediener bekannt sind. Dabei kommt besonders der Kenntnis folgender Merkmale Bedeutung zu:

  • die räumliche Orientierung der Occlusalebene (Kauebene) bezüglich eines Bezugspunkts des Panorama-Röntgengeräts; und
  • die individuelle anatomische Ausprägung des Kiefers, nach Größe, Form, Anomalien und dergleichen.
When taking a panoramic radiograph, the tomographic zone ideally passes through the patient's alveolar ridge. In order to achieve a high recording quality, it is necessary to bring the two elements tomography zone and alveolar ridge arch in the best possible spatial agreement. In this case, the tomography zone on the side of the panoramic X-ray device can, in principle, be adapted within certain limits to the individual shape and position of the jaw of a patient. However, the prerequisite is that they are known to the operator. In this case, the knowledge of the following features is particularly important:
  • the spatial orientation of the occlusal plane (occlusion plane) with respect to a reference point of the panoramic X-ray device; and
  • the individual anatomical expression of the jaw, according to size, shape, anomalies and the like.

Herkömmlich wird der Kopf des Patienten für eine Panorama-Röntgenaufnahme zum Gerät über eine Patientenkopfpositionierung mit Stirnstütze und/oder Ohrolivenhalten, Zahnaufbiss, Nasion oder einer Kinnauflage fixiert. Die notwendige Ausrichtung des Kopfes erfolgt typischerweise über Lichtlinien, die auf den Kopf des Patienten projiziert werden und die die Frankfurter Horizontale und die Medianebenen abbilden. Die Frankfurter Horizontale verläuft durch das rechte und linke Porion, den höchsten Punkt des Meatus acusticus externus, und das Orbitale, das den tiefsten Punkt des knöchernen Rands der Orbita darstellt. Die projizierte Medianebene verläuft als sagittale Ebene vom Scheitelpunkt über die Nasenmitte zum Kinn. Sie unterstützt die symmetrische Positionierung des Kopfes.Conventionally, the patient's head is fixed to the device for panoramic X-ray exposure via a patient's head positioning with forehead support and / or earlobe, tooth rack, nasion, or chin rest. The necessary alignment of the head is typically via light lines that are projected onto the patient's head and depicting the Frankfurt horizontal and the median levels. The Frankfurt horizontal runs through the right and left porion, the highest point of the external auditory meatus, and the orbital, which represents the lowest point of the orbital bony margin. The projected median plane runs as a sagittal plane from the vertex over the middle of the nose to the chin. It supports the symmetrical positioning of the head.

Die Lage der Kauebene wird nicht direkt erfasst, sondern nur indirekt über die Frankfurter Horizontale. Dazu wird über die vom Panorama-Röntgengerät auf den Kopf des Patienten projizierte Frankfurter Horizontale und die Schneidezähne im Aufbiss auf die Lage der Kauebene geschlossen. Die Korrelation zwischen Kauebene und Frankfurter Horizontale ist seitens der Anatomie zwar allgemein anerkannt, Positionierungsfehler bezüglich der Frankfurter Horizontale des Patienten sind dabei jedoch nicht ausgeschlossen.The position of the occlusal plane is not recorded directly, but only indirectly via the Frankfurt horizontal. For this purpose, the Frankfurt horizontal and the incisors projecting from the panoramic X-ray device onto the head of the patient are closed to the position of the occlusal plane. Although the correlation between the occlusal plane and the horizontal plane of Frankfurt is generally accepted by the anatomy, positioning errors with respect to the patient's Frankfurt horizontal are not excluded.

Um die individuelle Größe des Kiefers des Patienten zu bestimmen, kann optional eine Stirnweitenmessung durchgeführt werden. Die Ableitung der Kiefergröße ist jedoch nicht in hinreichendem Maß zuverlässig.In order to determine the individual size of the patient's jaw, an optional face size measurement can be performed. However, the derivation of the jaw size is not sufficiently reliable.

Auch existiert bislang kein verlässliches Verfahren zur Bestimmung der Form des Kieferkammbogens und möglicher Anomalien des Kiefers.Also, there is currently no reliable method for determining the shape of the alveolar ridge arch and possible anomalies of the jaw.

Heutige Panorama-Röntgengeräte bieten als Folge nur wenige Modifikationsmöglichkeiten, da der Bediener solche Einstellungsmöglichkeiten aufgrund der unzureichenden Kenntnis der individuellen Ausprägung des Kiefers eines Patienten ohnehin nicht nutzen könnte.Today's panoramic X-ray devices offer as a result, only a few modification options, since the operator could not use such setting options due to the insufficient knowledge of the individual expression of a patient's jaw anyway.

Aus der US 6,424,694 B1 ist ein Positionierapparat bekannt, der zur Erzeugung transversaler Schichtaufnahmen verwendet wird. Dieser Positionierapparat umfasst einen bezüglich dem Röntgengerät fest angeordneten Halter sowie eine verschwenkbare Platte, wobei Mittel vorgesehen sind, mit denen der Drehwinkel zwischen der Platte und dem Halter erfasst werden kann. Mit diesem Positionierapparat ist es möglich, die Neigung der Kauebene mittels der Verstellvorrichtung einzustellen. Allerdings ist der in D1 offenbarte Positionierapparat nur zur Erstellung transversaler Schichtaufnahmen geeignet.From the US Pat. No. 6,424,694 B1 For example, a positioning apparatus is known which uses to generate transversal tomograms becomes. This positioning apparatus comprises a fixedly arranged with respect to the X-ray apparatus holder and a pivotable plate, wherein means are provided, with which the angle of rotation between the plate and the holder can be detected. With this positioning, it is possible to adjust the inclination of the occlusal plane by means of the adjustment. However, the positioning apparatus disclosed in D1 is only suitable for creating transversal tomograms.

Aus der US 6,118,842 ist Röntgeneinrichtung zur Erstellung von tomographischen Aufnahmen und von Panoramaschichtaufnahmen bekannt. Der Patientenkopf wird mittels einer horizontal und vertikal linear verfahrbaren Kinnstütze positioniert, wobei Eingabemittel vorgesehen sind, mit deren Hilfe gewünschte Positionen der Kinnstütze eingestellt werden können.From the US 6,118,842 X-ray device is known for the production of tomographic images and panoramic panoramic photographs. The patient's head is positioned by means of a horizontally and vertically linearly movable chin rest, wherein input means are provided, with the aid of which desired positions of the chin rest can be adjusted.

Die Position der Kinnstütze kann über Mittel zur Speicherung der Objektposition ausgelesen werden, wobei eine Änderung der Position über gesteuerte Motoren vorzunehmen ist, beispielsweise über Schrittmotoren.The position of the chin rest can be read out via means for storing the object position, wherein a change of the position is to be made via controlled motors, for example via stepper motors.

Der Erfindung, wie sie in den Ansprüchen gekennzeichnet ist, liegt die Aufgabe zugrunde, eine Vorrichtung zum korrekten Positionieren eines Patienten bei einer Aufnahme mit einem medizinischen Panorama-Röntgenaufnahmegerät anzugeben, die eine einfache und robuste Erfassung und/oder Einstellung der Neigung der Kauebene eines Patienten erlaubt.The invention, as characterized in the claims, the object of the invention is to provide a device for correct positioning of a patient in a recording with a panoramic medical X-ray recorder, a simple and robust detection and / or adjustment of the inclination of the occlusal plane of a patient allowed.

Darstellung der ErfindungPresentation of the invention

Diese Aufgabe wird erfindungsgemäß durch die Aufbissvorrichtung nach Anspruch 1 gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.This object is achieved by the biting device according to claim 1. Advantageous embodiments of the invention are the subject of the dependent claims.

Die Erfindung baut auf dem Stand der Technik dadurch auf, dass eine Aufbissvorrichtung ein zum Röntgengerät richtungsfest anordenbares Halterteil und eine gegen das Halterteil verschwenkbaren Platte enthält, die ein Aufbissteil aufweist, in das der Patient beißt. Die Aufbissvorrichtung enthält weiter Mittel zum Erfassen des mit der Neigung der Kauebene in Zusammenhang stehenden Schwenkwinkels α zwischen der Platte und dem Halterteil, wobei die Mittel zum Erfassen des Schwenkwinkels α in einem bei einer Röntgenaufnahme strahlenfreien Bereich der Aufbissvorrichtung angeordnet sind. Der von Röntgenstrahlen erfasste Bereich kann somit weitestgehend metallfrei gehalten werden.The invention builds on the state of the art in that a bite device contains a directionally fixed to the X-ray machine holder part and a pivotable against the holder part plate having a Aufbissteil, in which the patient bites. The bite apparatus further comprises means for detecting the tilt angle α associated with the inclination of the occlusal plane between the plate and the holder part, wherein the means for detecting the pivot angle α are arranged in a radiation-free region of the bite device in an X-ray exposure. The area covered by X-rays can thus be kept as free of metal as possible.

Die Erfindung beruht somit auf dem Gedanken, die relative Lage der Kauebene des Patienten zum Gerät über die Lagebestimmung einer in der Kauebene liegenden Platte zu erfassen. Dazu wird der Winkel zwischen der Platte und einem Halterteil gemessen, das relativ zum Röntgengerät mit einer festen Ausrichtung anordenbar ist. Aus diesem Winkel kann dann ein Signal abgeleitet werden, das die Neigung der Kauebene angibt.The invention is thus based on the idea of detecting the relative position of the patient's occlusal plane to the device via the position determination of a plate lying in the occlusal plane. For this purpose, the angle between the plate and a holder part is measured, which can be arranged relative to the X-ray device with a fixed orientation. From this angle, a signal can then be derived that indicates the inclination of the occlusal plane.

Die Mittel zum Erfassen des Schwenkwinkels α umfassen dabei zweckmäßig einen oder mehrere im Halterteil angeordnete Sensoren. Beispielsweise können die Sensoren durch eine im Halterteil angeordnete Lichtschranke gebildet sein, die die Position einer durch die Verschwenkung der Platte auf- und abbewegten Ausnehmung erfasst.The means for detecting the pivot angle α expediently comprise one or more sensors arranged in the holder part. For example, the sensors may be formed by a light barrier arranged in the holder part, which detects the position of a recess moved up and down by the pivoting of the plate.

Die erfindungsgemäße Aufbissvorrichtung kann zweckmäßig Mittel zur Anzeige der Winkelstellung der verschwenkbaren Platte enthalten.The bite device according to the invention may expediently include means for indicating the angular position of the pivotable plate.

Weiterhin sind Antriebsmittel zur Höhenverstellung des Halteteils und damit zum Verschwenken der Platte in eine vorbestimmte Winkelposition vorgesehen. Dadurch ist eine Anpassung an die Körpergröße des Patienten möglich und der Patient kann gezwungen werden, die Neigung seines Kopfes der Neigung der Platte anzupassen, bei der eine gewünschte Winkelposition der Kauebene des Patienten relativ zum Röntgengerät erreicht ist.Furthermore, drive means are provided for adjusting the height of the holding part and thus for pivoting the plate in a predetermined angular position. Thereby an adaptation to the body size of the patient is possible and the patient can be forced to adjust the inclination of his head of the inclination of the plate, in which a desired angular position of the occlusal plane of the patient is achieved relative to the X-ray device.

Mit Vorteil fahren die Mittel zum Verschwenken der Platte die vorbestimmte Winkelposition automatisch an und halten bei Erreichen der vorbestimmten Winkelposition an.Advantageously, the means for pivoting the plate drive the predetermined angular position automatically and stop on reaching the predetermined angular position.

Zusätzlich kann vorgesehen sein, dass die Mittel das Erreichen der vorbestimmten Winkelposition der Platte durch optische und/oder akustische Signale anzeigen.In addition, it can be provided that the means indicate the achievement of the predetermined angular position of the plate by optical and / or acoustic signals.

In einer bevorzugten Ausgestaltung der erfindungsgemäßen Aufbissvorrichtung ist die schwenkbare Platte mit einer im Halterteil auf- und abbeweglichen Schiene verbunden, die eine Ausnehmung zur Positionsbestimmung der Schiene im Halterteil aufweist. Aus der Position der Ausnehmung im Halterteil kann dann auf den Schwenkwinkel α geschlossen werden.In a preferred embodiment of the bite device according to the invention, the pivotable plate is connected to a rail movable up and down in the holder part, which has a recess for determining the position of the rail in the holder part. From the position of the recess in the holder part can then be closed to the swivel angle α.

Das Aufbissteil der Aufbissvorrichtung ist in einer zweckmäßigen Ausgestaltung aus hygienischen Gründen mit einer auswechselbaren Schutzhülle versehen.The Aufbissteil the bite device is provided in an expedient embodiment for reasons of hygiene with a removable protective cover.

Alternativ kann das Aufbissteil durch einen auswechselbaren Aufbisseinsatz gebildet sein. Der Aufbisseinsatz ist dabei bevorzugt aus einem weichen Material gebildet, insbesondere aus einem im Wesentlichen röntgenstrahlendurchlässigen Material. Als besonders gut geeignet hat sich die Fertigung des Aufbisseinsatzes aus geschlossenzelligem Ethylenschaum herausgestellt.Alternatively, the bite portion may be formed by a replaceable bite insert. The bite insert is preferably formed of a soft material, in particular of a substantially radiolucent material. The production of the bite insert made of closed-cell ethylene foam has proven particularly suitable.

Der Aufbisseinsatz nimmt zweckmäßig einen Winkelbereich β des Kieferbogens auf, der zwischen 20° und 40°, insbesondere bei etwa 30° liegt. Dadurch wird ein seitliches Kippen oder eine Neigung des Kopfes des Patienten weitgehend vermieden.The Aufbissinsatz expediently takes an angle range β of the mandibular arch, which is between 20 ° and 40 °, in particular at about 30 °. As a result, lateral tilting or tilting of the patient's head is largely avoided.

In einer vorteilhaften Gestaltung weist der Aufbisseinsatz auf seiner Oberseite und seiner Unterseite eine Bissrille zur Aufnahme eines Teils des Zahnbogens von Ober- und Unterkiefer des Patienten auf.In an advantageous embodiment, the bite insert on its top and bottom underside a bite groove for receiving a portion of the dental arch of the upper and lower jaw of the patient.

Der Aufbisseinsatz ist mit Vorteil einstückig und entlang einer Faltkante klappbar ausgebildet. Zweckmäßig weist er an gegenüberliegenden Seiten einen sich keilförmig verjüngenden Vorsprung und eine entsprechende Vertiefung zur Aufnahme des Vorsprungs auf, zum lösbaren Anbringen des Aufbisseinsatzes an die schwenkbare Platte.The Aufbisseinsatz is advantageously integrally formed and hinged along a folding edge. Suitably, it has on opposite sides of a wedge-shaped tapered projection and a corresponding recess for receiving the projection, for releasably attaching the Aufbisseinsatzes to the pivoting plate.

Weitere vorteilhafte Ausgestaltungen, Merkmale und Details der Erfindung ergeben sich aus den abhängigen Ansprüchen, der Beschreibung der Ausführungsbeispiele und den Zeichnungen.Further advantageous embodiments, features and details of the invention will become apparent from the dependent claims, the description of the embodiments and the drawings.

Kurzbeschreibung der ZeichnungBrief description of the drawing

Die Erfindung soll nachfolgend anhand eines Ausführungsbeispiels im Zusammenhang mit den Zeichnungen näher erläutert werden. Es sind jeweils nur die für das Verständnis der Erfindung wesentlichen Elemente dargestellt. Dabei zeigt

Fig. 1
eine schematische Darstellung einer PanoramaRöntgenaufnahmeeinrichtung;
Fig. 2
in schematischer Darstellung die Ausrichtung der Tomographiezone der Röntgenaufnahmeeinrichtung auf den Kieferbogenkamm eines Patienten;
Fig. 3
eine perspektivische Ansicht einer Aufbissvorrichtung nach einem Ausführungsbeispiel der Erfindung in schematischer Darstellung;
Fig. 4
einen Schnitt durch die Aufbissvorrichtung von Fig. 3;
Fig. 5
perspektivische Ansichten eines Aufbisseinsatzes für eine Aufbissvorrichtung nach einem Ausführungsbeispiel der Erfindung, gesehen aufgeklappt in (a) schräg von unten und in (b) schräg von oben;
Fig. 6
einen Schnitt durch den Aufbisseinsatz von Fig. 5, gesehen entlang der Linie VI-VI; und
Fig. 7
den Aufbisseinsatz von Fig. 5 in zusammengeklappter Stellung, wie er an der Aufbissvorrichtung der Fig. 3 angebracht ist.
The invention will be explained in more detail with reference to an embodiment in conjunction with the drawings. In each case only the essential elements for understanding the invention are shown. It shows
Fig. 1
a schematic representation of a panoramic X-ray receiver;
Fig. 2
a schematic representation of the alignment of the tomographic zone of the X-ray device on the mandibular arch of a patient;
Fig. 3
a perspective view of a bite device according to an embodiment of the invention in a schematic representation;
Fig. 4
a section through the bite of Fig. 3 ;
Fig. 5
perspective views of a Aufbissseinsatzes for a bite device according to an embodiment of the invention, as seen in (a) obliquely from below and in (b) obliquely from above;
Fig. 6
a section through the bite of Fig. 5 , seen along the line VI-VI; and
Fig. 7
the bite of Fig. 5 in the folded position, as he at the bite of the Fig. 3 is appropriate.

Ausführungsbeispieleembodiments

Fig. 1 zeigt in schematischer Darstellung eine Panorama-Röntgenaufnahmeeinrichtung 10, bei der eine schwenkbare Einheit 12 eine Strahlenquelle 14 mit einer Blende 16, und eine gegenüberliegende Detektorkamera 18 mit einer Blende 20 trägt. Der von der Strahlenquelle 14 ausgehende Röntgenstrahl 22 durchleuchtet den Kieferbereich des Kopfes 24 eines Patienten und erzeugt in der Detektorkamera 18 ein Bildsignal. Dieses wird einer Auswerteeinheit 26 zur Auswertung und Darstellung in an sich bekannter Weise zugeführt. Fig. 1 shows a schematic representation of a panoramic X-ray recording device 10, wherein a pivotable Unit 12 carries a radiation source 14 with a diaphragm 16, and an opposite detector camera 18 with a diaphragm 20. The X-ray 22 emanating from the radiation source 14 transilluminates the jaw region of the head 24 of a patient and generates an image signal in the detector camera 18. This is fed to an evaluation unit 26 for evaluation and display in a conventional manner.

Die Dreheinheit 12 ist an einem Ausleger 11 dreh- bzw. schwenkbar befestigt, wobei der Ausleger 11 an einer Säule 13 höhenverstellbar gelagert ist. Zur Durchführung der Höhenverstellung ist ein Antrieb 15 vorgesehen. Auf diese Art und Weise können der Röntgenstrahler 14 und die Detektorkamera 18 auf die Größe des Patienten ausgerichtet werden.The rotary unit 12 is attached to a boom 11 rotatably or pivotally mounted, wherein the boom 11 is mounted vertically adjustable on a column 13. To carry out the height adjustment, a drive 15 is provided. In this way, the X-ray source 14 and the detector camera 18 can be aligned to the size of the patient.

Wesentlich für eine fehlerfreie Panorama-Röntgenaufnahme hoher Qualität ist die Ausrichtung der Tomographiezone 30 (Fig. 2) auf den Kieferbogenkamm 32 des Patienten. Fig. 2 zeigt eine perfekte räumliche Ausrichtung der beiden Elemente, die eine qualitativ einwandfreie Aufnahme sicherstellt. Eine unzureichende Ausrichtung kann dazu führen, dass eine Wiederholungsaufnahme notwendig wird, die zu einer erhöhten Strahlenbelastung des Patienten und zu zusätzlichem Material- und Zeitaufwand führt.Essential for a high-quality, error-free panoramic radiograph is the alignment of the tomographic zone 30 (FIG. Fig. 2 ) on the mandibular arch comb 32 of the patient. Fig. 2 shows a perfect spatial alignment of the two elements, which ensures a qualitatively perfect recording. Inadequate alignment can lead to the need for a repeat scan, resulting in increased patient exposure and additional material and time.

Fig. 3 zeigt eine perspektivische Ansicht einer allgemein mit 40 bezeichneten Aufbissvorrichtung nach einem Ausführungsbeispiel der Erfindung in schematischer Darstellung, Fig. 4 einen Schnitt durch die Aufbissvorrichtung 40 von Fig. 3. Die Aufbissvorrichtung 40 weist einen Halter 42 auf, an den über ein Gelenk 44 eine dünne Platte 46 schwenkbar angelenkt ist. Auf ihrer vom Gelenk 44 abgewandten Seite geht die dünne Platte 46 in einen parallel zur dünnen Platte ausgebildeten Aufnahmebereich 48 über. Fig. 3 shows a perspective view of a bite device generally designated 40 according to an embodiment of the invention in a schematic representation, Fig. 4 a section through the bite device 40 of Fig. 3 , The bite device 40 has a holder 42, to which a thin plate 46 is pivotally connected via a joint 44. On its side facing away from the hinge 44, the thin plate 46 merges into a receiving region 48 formed parallel to the thin plate.

Der Aufnahmebereich 48 weist eine Ausnehmung 62 auf, mittels deren in weiter unten genauer beschriebener Weise ein auswechselbarer Aufbisseinsatz 50 schnell und unkompliziert an der dünnen Platte befestigt werden kann. An seiner Ober- und Unterseite ist der Aufbisseinsatz 50 jeweils mit einer Bissrille 64 bzw. 66 versehen, die jeweils den Zahnbogen von Ober- bzw. Unterkiefer des Patienten aufnehmen. Durch diese Gestaltung ist sichergestellt, dass die dünne Platte 46 parallel zur Kauebene des Patienten liegt, wenn er bei der Röntgenaufnahme in den Aufbisseinsatz 50 beißt.The receiving area 48 has a recess 62, by means of which in a manner described in more detail below, a replaceable Aufbisseinsatz 50 can be quickly and easily attached to the thin plate. At its top and bottom, the bite insert 50 is provided with a bite groove 64 and 66 respectively, each receiving the dental arch of the upper and lower jaw of the patient. This design ensures that the thin plate 46 is parallel to the patient's occlusal plane as it bites into the bite insert 50 during X-ray exposure.

Der Schwenkwinkel α der dünnen Platte 46 wird über eine auf- und abbewegliche Schiene 54 gemessen, die in einem Bereich 56 mit der dünnen Platte 46 verbunden ist, und im Inneren 52 des Halterteils 42 senkrecht nach unten verläuft. In ihrem unteren Abschnitt ist die Schiene 54 mit einem Loch 58 versehen. Die Höhenlage des Loches 58 wird durch zwei Lichtschranken ermittelt, die durch die Pfeile 60 angedeutet sind. Aus der Höhenlage kann auf den Schwenkwinkel der Platte 46 zurückgeschlossen werden. Durch die Übertragung der Neigung der Platte 46 auf die bewegliche Schiene wird die Messung des Schwenkwinkels α weit nach unten in einen strahlungsfreien Bereich des Halters 42 verlegt. Der Röntgenbereich kann damit weitestgehend metallfrei gehalten werden.The pivoting angle α of the thin plate 46 is measured via a movable up and down rail 54, which is connected in a region 56 with the thin plate 46, and in the interior 52 of the holder member 42 extends vertically downwards. In its lower portion, the rail 54 is provided with a hole 58. The altitude of the hole 58 is determined by two light barriers, which are indicated by the arrows 60. From the altitude can be deduced the pivot angle of the plate 46. By transmitting the inclination of the plate 46 on the movable rail, the measurement of the pivot angle α is moved far down in a radiation-free region of the holder 42. The X-ray region can thus be kept largely free of metal.

Die Aufbissvorrichtung wirkt mit einer in Fig. 1 dargestellten Antriebseinrichtung 15 zusammen, so daß die Schiene 54 auf- oder abbewegt wird und damit die dünne Platte 46 in eine gewünschte Position gebracht werden kann. Durch die mit der Höhenverstellung einhergehende Verschwenkung der dünnen Platte 46 wird der Kopf des Patienten sanft in geführt, bis er die korrekte Neigung für die Panorama-Röntgenaufnahme erreicht hat.The bite device acts with a in Fig. 1 shown drive means 15 together, so that the rail 54 is moved up or down and thus the thin plate 46 can be brought into a desired position. The associated with the height adjustment pivoting of the thin plate 46 of the patient's head is gently guided in until he has reached the correct slope for the panoramic radiograph.

Die Höhenverstellung der Platte 46 kann dabei interaktiv durch den Bediener erfolgen. Beispielsweise kann der Bediener solange auf einen Justierknopf drücken, bis die gewünschte Neigung erreicht ist. Das Erreichen einer vorher eingestellten Winkelstellung, beispielsweise α = 105°, die einem Winkel zwischen Patte 46 und der Horizontalen von 15° entspricht, kann durch optische und/oder akustische Signale angezeigt werden.The height adjustment of the plate 46 can be done interactively by the operator. For example, the operator may press on an adjustment button until the desired inclination is reached. Achieving a previously set angular position, for example α = 105 °, which corresponds to an angle between flap 46 and the horizontal of 15 °, can be indicated by optical and / or acoustic signals.

Alternativ kann der Antrieb die Platte 46 automatisch in die eingestellte Winkelstellung fahren und bei Erreichen der gewünschten Position anhalten. Zusätzlich kann die Winkelstellung der Platte zur Kontrolle für den Bediener angezeigt werden.Alternatively, the drive can drive the plate 46 automatically in the set angular position and stop when reaching the desired position. In addition, the angular position of the plate can be displayed for the operator to check.

Der in den Figuren 3 und 4 gezeigte Aufbisseinsatz 50 wird nun mit Bezug auf die Figuren 5 bis 7 näher beschrieben. Dabei zeigt Fig. 5 in (a) und (b) eine perspektivische Ansicht des aufgeklappten Einsatzes, gesehen in Fig. 5(a) schräg von unten und in Fig. 5(b) schräg von oben. Figur 6 zeigt einen Schnitt durch den Aufbisseinsatz entlang der Linie VI-VI der Fig. 5(b) und Fig. 7 stellt den Aufbisseinsatz in zusammengeklappter Stellung dar, wie er an der Aufbissvorrichtung der Fig. 3 angebracht ist.The in the FIGS. 3 and 4 Bite insert 50 will now be described with reference to FIGS FIGS. 5 to 7 described in more detail. It shows Fig. 5 in (a) and (b) is a perspective view of the unfolded insert, seen in Fig. 5 (a) diagonally from below and in Fig. 5 (b) diagonally from above. FIG. 6 shows a section through the bite insert along the line VI-VI of Fig. 5 (b) and Fig. 7 represents the Aufbissinsatz in folded position, as he at the bite of the Fig. 3 is appropriate.

Der Aufbisseinsatz 50 ist im Ausführungsbeispiel einstückig aus geschlossenzelligem Ethylenschaum gefertigt, einem weichen, weitgehend röntgenstrahlendurchlässigem Material. An seiner Oberseite weist der Aufbisseinsatz 50 Bissrillen 64 und 66 auf, die einen Teil des Zahnbogens von Ober- und Unterkiefer des Patienten aufnehmen. Der Aufbisseinsatz 50 kann entlang einer mittigen Faltkante 70 zusammengeklappt werden, welche durch Einkerbungen 72 auf der Unterseite und eine Mittelrille 74 auf der Oberseite des Einsatzes festgelegt ist.In the exemplary embodiment, the bite insert 50 is produced in one piece from closed-cell ethylene foam, a soft, largely X-ray transparent material. On its upper side, the bite insert 50 has bite grooves 64 and 66 which receive a portion of the dental arch of the patient's upper and lower jaws. The bite insert 50 may be folded along a central fold edge 70 defined by notches 72 on the bottom and a center groove 74 on the top of the insert.

Auf seiner Unterseite weist der Aufbisseinsatz 50 einen sich keilförmig verjüngenden Vorsprung 76 auf, der beim Zusammenklappen in eine auf der gegenüberliegenden Seite des Einsatzes angeordnete entsprechende Vertiefung 78 eingreift und eine stabile, aber leicht lösbare Verbindung herstellt. Der flächige Aufnahmebereich 48 der Aufbissvorrichtung enthält eine Ausnehmung 62 (Fig. 4), durch die der Vorsprung 76 beim Anbringen des Aufbisseinsatzes hindurchgreift, so dass der Einsatz 50 nach dem Zusammenklappen mit der dünnen Platte 46 der Aufbissvorrichtung fest verbunden ist. Nach der Benutzung kann der Einsatz jedoch ohne große Kraftanstrengung wieder aufgeklappt und aus Hygienegründen weggeworfen werden.On its underside, the bite insert 50 has a wedge-shaped tapered projection 76 which, when folded, engages a corresponding recess 78 disposed on the opposite side of the insert to produce a stable but easily releasable connection. The planar receiving region 48 of the bite device contains a recess 62 (FIG. Fig. 4 ), through which the projection 76 engages when attaching the Aufbissinsatzes, so that the insert 50 is fixedly connected after folding with the thin plate 46 of the bite device. After use, however, the insert can be unfolded again without great effort and thrown away for reasons of hygiene.

Der im Ausführungsbeispiel der Figuren 5 bis 7 gezeigte Einsatz nimmt bei einer Breite von 40 mm einen Winkelbereich β des Zahnbogens von etwa 30° auf. Um der unterschiedlichen Kiefergröße der Patienten gerecht zu werden, werden Aufbisseinsätze auch in anderen Breiten hergestellt und verwendet. Die unterschiedlichen Breiten lassen sich dabei durch verschiedene Farbmarkierungen oder andere Kennzeichnungen für den Verwender leicht unterscheiden. Mit einem derartigen Aufbisseinsatz erfolgt die Fixierung des Patienten sehr exakt und dennoch für den Patienten komfortabel.In the embodiment of the FIGS. 5 to 7 shown insert takes at a width of 40 mm on an angular range β of the dental arch of about 30 °. In order to meet the different jaw size of the patients, bite inserts are also manufactured and used in other widths. The different widths can be easily distinguished by different color markings or other markings for the user. With such a bite insert the fixation of the patient is very accurate and yet comfortable for the patient.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1010
RöntgenaufnahmeeinrichtungX-ray system
1212
Einheitunit
1414
Strahlenquelleradiation source
1515
AntriebseinrichtunAntriebseinrichtun
1616
Blendecover
1818
Detektorkameradetector camera
2020
Blendecover
2222
RöntgenstrahlenX-rays
2424
Kopfhead
2626
Auswerteeinheitevaluation
3030
Tomographiezonetomography zone
3232
KieferbogenkammAlveolar arch
4040
Aufbissvorrichtungbite device
4242
Halterholder
4444
Gelenkjoint
4646
Platteplate
4848
Aufnahmebereichreception area
5050
Aufbisseinsatzbite piece
5252
Inneres des Halterteils 42Interior of the holder part 42
5454
Schienerail
5656
BereichArea
5858
Lochhole
6060
Pfeilearrows
6262
Ausnehmungrecess
6464
Bissrillebite channel
6666
Bissrillebite channel
7070
Faltkantefold
7272
Einkerbungennotches
7474
Mittelrillecenter groove
7676
Vorsprunghead Start
7878
Vertiefungdeepening

Claims (16)

  1. A bite block assembly for correct positioning of a patient while taking a radiograph with a panoramic X-ray device, comprising a holding member (42) that can be located in a directionally stable position relative to said X-ray device, which holding member comprises a plate (46) that can be pivoted relatively to said holding member about a pivot (44) and exhibits a bite piece (50), on which the patient can bite, and comprising means (58, 60) for detecting the angle of deflection α between said plate (46) and said holding member (42), which means are disposed in a region of the bite block assembly (40) that is free from X-ray irradiation when the radiograph is being taken, characterized in that said bite block assembly comprises a driving system for vertically adjusting said holding member (42) and thus for pivoting said plate about said pivot (44) for the purpose of fixing the position of the patient biting on said bite piece, and that said driving system (15) is adapted to move said plate (46) automatically into a predefined angular position and to stop when said predefined angular position is attained.
  2. A bite block assembly as defined in claim 1, characterized in that said means (58, 60) for detecting the angle of deflection α comprise one or more sensors disposed in said holding member (42).
  3. A bite block assembly as defined in claim 1 or claim 2, characterized in that said bite block assembly comprises means for indicating the angular position of the pivotal plate (46).
  4. A bite block assembly as defined in claim 1 or claim 2, characterized in that said driving system (15) indicates when said predefined angular position of said plate (46) has been attained by means of optical and/or acoustic signals.
  5. A bite block assembly as defined in any one of the previous claims, characterized in that said pivotal plate (46) is connected to a rail (54) which is disposed in said holding member (42), is capable of being moved upwardly and downwardly and has an opening (58) for the purpose of positioning said rail (54) in said holding member (42).
  6. A bite block assembly as defined in any one of the previous claims, characterized in that said bite piece is provided with a replaceable protective sheath.
  7. A bite block assembly as defined in any one of claims 1 to 5, characterized in that said bite piece is in the form of a replaceable occlusal insert (50).
  8. A bite block assembly as defined in claim 7, characterized in that said occlusal insert (50) is of a soft material.
  9. A bite block assembly as defined in claim 7 or claim 8, characterized in that said occlusal insert (50) is of a substantially radiolucent material.
  10. A bite block assembly as defined in any one of claims 7 to 9, characterized in that said occlusal insert (50) is made of closed-cell ethylene foam.
  11. A bite block assembly as defined in any one of claims 7 to 10, characterized in that said occlusal insert (50) occupies an angle β of the dental arch which ranges from 20° to 40° and is, in particular, approximately 30°.
  12. A bite block assembly as defined in any one of claims 7 to 11, characterized in that said occlusal insert (50) has, on its upper surface and on its undersurface respectively, a bite groove (64, 66) for the accommodation of the dental arch of the upper and lower jaws of the patient.
  13. A bite block assembly as defined in any one of claims 7 to 12, characterized in that said occlusal insert (50) is a unitary piece and is foldable along a folding edge (70).
  14. A bite block assembly as defined in any one of claims 7 to 13, characterized in that said occlusal insert (50) has, on opposite sides thereof, a wedge-shaped tapered projection (76) and a complementary recess (78) for the accommodation of said projection (76) for releasably fitting said occlusal insert (50) to said pivotal plate (46).
  15. A method for correctly positioning a patient while taking a radiograph with a panoramic X-ray device, using a bite block assembly comprising a holding member (42) that can be located in a directionally stable position relative to said X-ray device, which holding member comprises a plate (46) that can be pivoted relatively to said holding member about a pivot (44) and exhibits a bite piece (50), on which the patient bites, and comprising means (58, 60) for detecting the angle of deflection α between said plate (46) and said holding member (42), which means are disposed in a region of the bite block assembly (40) that is free from X-ray irradiation when the radiograph is being taken, and comprising a driving system for vertically adjusting said holding member (42) and thus for pivoting said plate about said pivot (44) for the purpose of fixing the position of the patient biting on said bite piece, said driving system (15) being adapted to move said plate (46) automatically to a predefined angular position and to stop when said predefined angular position is attained.
  16. A method as defined in claim 15, characterized in that said driving system (15) indicates when said predefined angular position of said plate (46) has been attained by means of optical and/or acoustic signals.
EP03767386A 2002-10-25 2003-10-27 Bite device used with a panorama x-ray device Expired - Lifetime EP1560520B1 (en)

Applications Claiming Priority (3)

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DE10250005 2002-10-25
DE10250005A DE10250005B4 (en) 2002-10-25 2002-10-25 Bite device for use with a panoramic X-ray device
PCT/DE2003/003572 WO2004039261A1 (en) 2002-10-25 2003-10-27 Bite device used with a panorama x-ray device

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EP (1) EP1560520B1 (en)
KR (1) KR101013638B1 (en)
CN (1) CN100382765C (en)
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AU (1) AU2003291920A1 (en)
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US7497619B2 (en) 2009-03-03
AU2003291920A1 (en) 2004-05-25
KR20050055035A (en) 2005-06-10
CN1705458A (en) 2005-12-07
CN100382765C (en) 2008-04-23
US20090154656A1 (en) 2009-06-18
US20060056582A1 (en) 2006-03-16
DE10250005A1 (en) 2004-05-19
US7785007B2 (en) 2010-08-31
ATE535193T1 (en) 2011-12-15
KR101013638B1 (en) 2011-02-10
EP1560520A1 (en) 2005-08-10
DE10250005B4 (en) 2009-03-19
WO2004039261A1 (en) 2004-05-13

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